Improving genome-wide mapping of nucleosomes in Trypanosome cruzi
Resumen:
In Trypanosoma cruzi DNA is packaged into chromatin by octamers of histone proteins that form nucleosomes. Transcription of protein coding genes in trypanosomes is constitutive producing polycistronic units and gene expression is primarily regulated post-transcriptionally. However, chromatin organization influences DNA dependent processes. Hence, determining nucleosome position is of uppermost importance to understand the peculiarities found in trypanosomes. To map nucleosomes genome-wide in several organisms, digestion of chromatin with micrococcal nuclease followed by deep sequencing has been applied. Nonetheless, the special requirements for cell manipulation and the uniqueness of the chromatin organization in trypanosomes entails a customized analytical approach. In this work, we adjusted this broadly used method to the hybrid reference strain, CL Brener. Particularly, we implemented an exhaustive and thorough computational workflow to overcome the difficulties imposed by this complex genome. We tested the performance of two aligners, Bowtie2 and HISAT2, and discuss their advantages and caveats. Specifically, we highlight the relevance of using the whole genome as a reference instead of the commonly used Esmeraldo-like haplotype to avoid spurious alignments. Additionally, we show that using the whole genome refines the average nucleosome representation, but also the quality of mapping for every region represented. Moreover, we show that the average nucleosome organization around trans-splicing acceptor site described before, is not just an average since the same chromatin pattern is detected for most of the represented regions. In addition, we extended the study to a non-hybrid strain applying the experimental and analytical approach to SylvioX10 strain. Furthermore, we provide a source code for the construction of 2D plots and heatmaps which are easy to adapt to any T. cruzi strain.
2023 | |
Genomics Nucleosomes Nucleosome mapping Trypanosoma cruzi Sequence alignment Chromatin Haplotypes |
|
Inglés | |
Universidad de la República | |
COLIBRI | |
https://hdl.handle.net/20.500.12008/43171 | |
Acceso abierto | |
Licencia Creative Commons Atribución (CC - By 4.0) |
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---|---|
author | Beati, Paula |
author2 | Massimino Stepñick, Milena Vilchez Larrea, Salomé C Smircich, Pablo Alonso, Guillermo D. Ocampo, Josefina |
author2_role | author author author author author |
author_facet | Beati, Paula Massimino Stepñick, Milena Vilchez Larrea, Salomé C Smircich, Pablo Alonso, Guillermo D. Ocampo, Josefina |
author_role | author |
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collection | COLIBRI |
dc.contributor.filiacion.none.fl_str_mv | Beati Paula Massimino Stepñick Milena Vilchez Larrea Salomé C Smircich Pablo, Universidad de la República (Uruguay). Facultad de Ciencias. Instituto de Biología. Alonso Guillermo D. Ocampo Josefina |
dc.creator.none.fl_str_mv | Beati, Paula Massimino Stepñick, Milena Vilchez Larrea, Salomé C Smircich, Pablo Alonso, Guillermo D. Ocampo, Josefina |
dc.date.accessioned.none.fl_str_mv | 2024-03-19T12:15:22Z |
dc.date.available.none.fl_str_mv | 2024-03-19T12:15:22Z |
dc.date.issued.none.fl_str_mv | 2023 |
dc.description.abstract.none.fl_txt_mv | In Trypanosoma cruzi DNA is packaged into chromatin by octamers of histone proteins that form nucleosomes. Transcription of protein coding genes in trypanosomes is constitutive producing polycistronic units and gene expression is primarily regulated post-transcriptionally. However, chromatin organization influences DNA dependent processes. Hence, determining nucleosome position is of uppermost importance to understand the peculiarities found in trypanosomes. To map nucleosomes genome-wide in several organisms, digestion of chromatin with micrococcal nuclease followed by deep sequencing has been applied. Nonetheless, the special requirements for cell manipulation and the uniqueness of the chromatin organization in trypanosomes entails a customized analytical approach. In this work, we adjusted this broadly used method to the hybrid reference strain, CL Brener. Particularly, we implemented an exhaustive and thorough computational workflow to overcome the difficulties imposed by this complex genome. We tested the performance of two aligners, Bowtie2 and HISAT2, and discuss their advantages and caveats. Specifically, we highlight the relevance of using the whole genome as a reference instead of the commonly used Esmeraldo-like haplotype to avoid spurious alignments. Additionally, we show that using the whole genome refines the average nucleosome representation, but also the quality of mapping for every region represented. Moreover, we show that the average nucleosome organization around trans-splicing acceptor site described before, is not just an average since the same chromatin pattern is detected for most of the represented regions. In addition, we extended the study to a non-hybrid strain applying the experimental and analytical approach to SylvioX10 strain. Furthermore, we provide a source code for the construction of 2D plots and heatmaps which are easy to adapt to any T. cruzi strain. |
dc.format.extent.es.fl_str_mv | 16 h. |
dc.format.mimetype.es.fl_str_mv | application/pdf |
dc.identifier.citation.es.fl_str_mv | Beati, P, Massimino Stepñick, M, Vilchez Larrea, S [y otros autores]. "Improving genome-wide mapping of nucleosomes in Trypanosome cruzi". Plos One. [en línea] 2023, 18(11): e0293809. 16 h. DOI: 10.1371/journal.pone.0293809. |
dc.identifier.doi.none.fl_str_mv | 10.1371/journal.pone.0293809 |
dc.identifier.issn.none.fl_str_mv | 1932-6203 |
dc.identifier.uri.none.fl_str_mv | https://hdl.handle.net/20.500.12008/43171 |
dc.language.iso.none.fl_str_mv | en eng |
dc.publisher.es.fl_str_mv | PLOS |
dc.relation.ispartof.es.fl_str_mv | Plos One, 2023, 18(11): e0293809. |
dc.rights.license.none.fl_str_mv | Licencia Creative Commons Atribución (CC - By 4.0) |
dc.rights.none.fl_str_mv | info:eu-repo/semantics/openAccess |
dc.source.none.fl_str_mv | reponame:COLIBRI instname:Universidad de la República instacron:Universidad de la República |
dc.subject.es.fl_str_mv | Genomics Nucleosomes Nucleosome mapping Trypanosoma cruzi Sequence alignment Chromatin Haplotypes |
dc.title.none.fl_str_mv | Improving genome-wide mapping of nucleosomes in Trypanosome cruzi |
dc.type.es.fl_str_mv | Artículo |
dc.type.none.fl_str_mv | info:eu-repo/semantics/article |
dc.type.version.none.fl_str_mv | info:eu-repo/semantics/publishedVersion |
description | In Trypanosoma cruzi DNA is packaged into chromatin by octamers of histone proteins that form nucleosomes. Transcription of protein coding genes in trypanosomes is constitutive producing polycistronic units and gene expression is primarily regulated post-transcriptionally. However, chromatin organization influences DNA dependent processes. Hence, determining nucleosome position is of uppermost importance to understand the peculiarities found in trypanosomes. To map nucleosomes genome-wide in several organisms, digestion of chromatin with micrococcal nuclease followed by deep sequencing has been applied. Nonetheless, the special requirements for cell manipulation and the uniqueness of the chromatin organization in trypanosomes entails a customized analytical approach. In this work, we adjusted this broadly used method to the hybrid reference strain, CL Brener. Particularly, we implemented an exhaustive and thorough computational workflow to overcome the difficulties imposed by this complex genome. We tested the performance of two aligners, Bowtie2 and HISAT2, and discuss their advantages and caveats. Specifically, we highlight the relevance of using the whole genome as a reference instead of the commonly used Esmeraldo-like haplotype to avoid spurious alignments. Additionally, we show that using the whole genome refines the average nucleosome representation, but also the quality of mapping for every region represented. Moreover, we show that the average nucleosome organization around trans-splicing acceptor site described before, is not just an average since the same chromatin pattern is detected for most of the represented regions. In addition, we extended the study to a non-hybrid strain applying the experimental and analytical approach to SylvioX10 strain. Furthermore, we provide a source code for the construction of 2D plots and heatmaps which are easy to adapt to any T. cruzi strain. |
eu_rights_str_mv | openAccess |
format | article |
id | COLIBRI_08b8c2202912a101dbb019b754aaf2b9 |
identifier_str_mv | Beati, P, Massimino Stepñick, M, Vilchez Larrea, S [y otros autores]. "Improving genome-wide mapping of nucleosomes in Trypanosome cruzi". Plos One. [en línea] 2023, 18(11): e0293809. 16 h. DOI: 10.1371/journal.pone.0293809. 1932-6203 10.1371/journal.pone.0293809 |
instacron_str | Universidad de la República |
institution | Universidad de la República |
instname_str | Universidad de la República |
language | eng |
language_invalid_str_mv | en |
network_acronym_str | COLIBRI |
network_name_str | COLIBRI |
oai_identifier_str | oai:colibri.udelar.edu.uy:20.500.12008/43171 |
publishDate | 2023 |
reponame_str | COLIBRI |
repository.mail.fl_str_mv | mabel.seroubian@seciu.edu.uy |
repository.name.fl_str_mv | COLIBRI - Universidad de la República |
repository_id_str | 4771 |
rights_invalid_str_mv | Licencia Creative Commons Atribución (CC - By 4.0) |
spelling | Beati PaulaMassimino Stepñick MilenaVilchez Larrea Salomé CSmircich Pablo, Universidad de la República (Uruguay). Facultad de Ciencias. Instituto de Biología.Alonso Guillermo D.Ocampo Josefina2024-03-19T12:15:22Z2024-03-19T12:15:22Z2023Beati, P, Massimino Stepñick, M, Vilchez Larrea, S [y otros autores]. "Improving genome-wide mapping of nucleosomes in Trypanosome cruzi". Plos One. [en línea] 2023, 18(11): e0293809. 16 h. DOI: 10.1371/journal.pone.0293809.1932-6203https://hdl.handle.net/20.500.12008/4317110.1371/journal.pone.0293809In Trypanosoma cruzi DNA is packaged into chromatin by octamers of histone proteins that form nucleosomes. Transcription of protein coding genes in trypanosomes is constitutive producing polycistronic units and gene expression is primarily regulated post-transcriptionally. However, chromatin organization influences DNA dependent processes. Hence, determining nucleosome position is of uppermost importance to understand the peculiarities found in trypanosomes. To map nucleosomes genome-wide in several organisms, digestion of chromatin with micrococcal nuclease followed by deep sequencing has been applied. Nonetheless, the special requirements for cell manipulation and the uniqueness of the chromatin organization in trypanosomes entails a customized analytical approach. In this work, we adjusted this broadly used method to the hybrid reference strain, CL Brener. Particularly, we implemented an exhaustive and thorough computational workflow to overcome the difficulties imposed by this complex genome. We tested the performance of two aligners, Bowtie2 and HISAT2, and discuss their advantages and caveats. Specifically, we highlight the relevance of using the whole genome as a reference instead of the commonly used Esmeraldo-like haplotype to avoid spurious alignments. Additionally, we show that using the whole genome refines the average nucleosome representation, but also the quality of mapping for every region represented. Moreover, we show that the average nucleosome organization around trans-splicing acceptor site described before, is not just an average since the same chromatin pattern is detected for most of the represented regions. In addition, we extended the study to a non-hybrid strain applying the experimental and analytical approach to SylvioX10 strain. Furthermore, we provide a source code for the construction of 2D plots and heatmaps which are easy to adapt to any T. cruzi strain.Submitted by Pintos Natalia (nataliapintosmvd@gmail.com) on 2024-03-18T18:22:50Z No. of bitstreams: 2 license_rdf: 24251 bytes, checksum: 71ed42ef0a0b648670f707320be37b90 (MD5) 10.1371.journal.pone.0293809.pdf: 2122127 bytes, checksum: 90df1092777713be2814132ec35cf3e5 (MD5)Approved for entry into archive by Faget Cecilia (lfaget@fcien.edu.uy) on 2024-03-19T11:59:07Z (GMT) No. of bitstreams: 2 license_rdf: 24251 bytes, checksum: 71ed42ef0a0b648670f707320be37b90 (MD5) 10.1371.journal.pone.0293809.pdf: 2122127 bytes, checksum: 90df1092777713be2814132ec35cf3e5 (MD5)Made available in DSpace by Luna Fabiana (fabiana.luna@seciu.edu.uy) on 2024-03-19T12:15:22Z (GMT). No. of bitstreams: 2 license_rdf: 24251 bytes, checksum: 71ed42ef0a0b648670f707320be37b90 (MD5) 10.1371.journal.pone.0293809.pdf: 2122127 bytes, checksum: 90df1092777713be2814132ec35cf3e5 (MD5) Previous issue date: 202316 h.application/pdfenengPLOSPlos One, 2023, 18(11): e0293809.Las obras depositadas en el Repositorio se rigen por la Ordenanza de los Derechos de la Propiedad Intelectual de la Universidad de la República.(Res. Nº 91 de C.D.C. de 8/III/1994 – D.O. 7/IV/1994) y por la Ordenanza del Repositorio Abierto de la Universidad de la República (Res. Nº 16 de C.D.C. de 07/10/2014)info:eu-repo/semantics/openAccessLicencia Creative Commons Atribución (CC - By 4.0)GenomicsNucleosomesNucleosome mappingTrypanosoma cruziSequence alignmentChromatinHaplotypesImproving genome-wide mapping of nucleosomes in Trypanosome cruziArtículoinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionreponame:COLIBRIinstname:Universidad de la Repúblicainstacron:Universidad de la RepúblicaBeati, PaulaMassimino Stepñick, MilenaVilchez Larrea, Salomé CSmircich, PabloAlonso, Guillermo D.Ocampo, JosefinaLICENSElicense.txtlicense.txttext/plain; charset=utf-84267http://localhost:8080/xmlui/bitstream/20.500.12008/43171/5/license.txt6429389a7df7277b72b7924fdc7d47a9MD55CC-LICENSElicense_urllicense_urltext/plain; charset=utf-844http://localhost:8080/xmlui/bitstream/20.500.12008/43171/2/license_urla0ebbeafb9d2ec7cbb19d7137ebc392cMD52license_textlicense_texttext/html; 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- Universidad de la Repúblicafalse |
spellingShingle | Improving genome-wide mapping of nucleosomes in Trypanosome cruzi Beati, Paula Genomics Nucleosomes Nucleosome mapping Trypanosoma cruzi Sequence alignment Chromatin Haplotypes |
status_str | publishedVersion |
title | Improving genome-wide mapping of nucleosomes in Trypanosome cruzi |
title_full | Improving genome-wide mapping of nucleosomes in Trypanosome cruzi |
title_fullStr | Improving genome-wide mapping of nucleosomes in Trypanosome cruzi |
title_full_unstemmed | Improving genome-wide mapping of nucleosomes in Trypanosome cruzi |
title_short | Improving genome-wide mapping of nucleosomes in Trypanosome cruzi |
title_sort | Improving genome-wide mapping of nucleosomes in Trypanosome cruzi |
topic | Genomics Nucleosomes Nucleosome mapping Trypanosoma cruzi Sequence alignment Chromatin Haplotypes |
url | https://hdl.handle.net/20.500.12008/43171 |